Organisms in the Xevoz Planet are divided into 8 species:

  • Neo Sapiens: Science-fiction-themed, near-future humans.
  • Meta-Beast: Anthropomorphic animals.
  • Sectoid: Giant insects and bugs, frequently larger than humans.
  • Hyperfuries: Elemental creatures.
  • Biomecha: Almost completely mechanical cyborgs.
  • Unnatural: Undead creatures.
  • Reptosaur: Reptilian/draconic creatures.
  • Arcaster: Originally named Runics. Fantasy-themed, magic-using humans.

Note: Reptosaurs and Arcasters were added in Wave 4.